Glossostigma

Glossostigma elatinoides

Plantae›Tracheophyta›Magnoliopsida›Phrymaceae

📍 Australia & New Guinea

Glossostigma elatinoides was one of the first foreground carpeting plants popularised by Takashi Amano in the Nature Aquarium style. Its tiny spoon-shaped leaves form an extremely low, dense green carpet when grown under high light with CO2. Without strong light it grows upward rather than creeping, defeating the purpose. It is one of the most demanding carpeting plants but produces one of the most pristine, turf-like results when conditions are ideal.

Tank Mates

Otocinclus

Algae-eating fish that graze on biofilm without uprooting delicate carpet plants

excellent

Red Cherry Shrimp

Small, gentle shrimp that forage on algae and detritus without damaging plant structure

excellent

Amano Shrimp

Efficient algae control and biofilm grazing; larger than cherry shrimp but still safe for carpets

good

Ember Tetra

Tiny, peaceful fish that occupy mid-water column and do not disturb substrate or plants

excellent

Monte Carlo

Complementary foreground plant with similar care requirements; creates layered carpet effect

excellent

Dwarf Hairgrass

Alternative or companion foreground plant; both require high light and CO₂ for optimal growth

good

Common Diseases

Nutrient Deficiency (Nitrogen/Iron)

Symptoms

Yellowing or pale leaves, stunted growth, loss of vibrant green coloration, reduced carpet density

Treatment

Increase fertilizer dosing frequency; use all-in-one liquid fertilizers or macronutrient supplements. Test water parameters and adjust based on results. Ensure adequate CO₂ injection to maximize nutrient uptake.

Algae Overgrowth (Green/Brown Algae)

Symptoms

Visible algae coating on plant leaves, reduced light penetration, plant growth slowing or halting

Treatment

Increase water change frequency (50% weekly), reduce photoperiod to 6-8 hours, add algae-eating fauna (Otocinclus, shrimp), and ensure CO₂ levels are adequate to outcompete algae.

Melting (Tissue Degradation)

Symptoms

Leaves becoming translucent, mushy texture, rapid tissue breakdown, plant dissolving into substrate

Treatment

Improve water quality through frequent water changes; verify CO₂ injection is functioning; ensure light intensity meets 150–250 PAR minimum. Adjust temperature to 20–24 °C if elevated. Remove severely affected portions.

Poor Growth/Stunting

Symptoms

Minimal horizontal spread, upright growth instead of carpeting, small pale leaves, slow runner development

Treatment

Verify light levels meet 150–250 PAR; increase CO₂ injection rate; boost fertilizer dosing; check substrate quality and ensure fine-grain aquasoil is present. Confirm water parameters are within range (pH 6.0–7.0, temperature 20–28 °C).

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Quick Facts

co2: Essential
light: Very high (150–250 PAR); will not carpet under low light
placement: Foreground carpet
substrate: Fine-grain aquasoil; low iron substrate helps prevent overshooting
growth rate: Fast under ideal conditions
propagation: Spreads via creeping runners